Tool for driving fasteners



April 10, 1962 G. J. VAN HECKE TQOL FOR DRIVING FASTENERS Filed Nov. '7,1958 Wk M 6 .1 3 PM m MW 7 p M H I uuauul u i l hh. e mafia m m M flllluf'l'l u &\

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United States Patent 3,028,987 TOOL FOR DRIVKNG FASTENERS George J. VanHecke, Detroit, Mich., assignor to Huck Manufacturing Company, Detroit,Mich., a corporation of Michigan Filed Nov. 7, 1958, Ser. No. 772,466 5Claims. (Cl. 21842) This invention relates generally to apparatus forapplying fasteners and more particularly to an improved handoperatedtool for installing fasteners of the pin and collar type.

An object of this invention, therefore, is to provide a hand tool forapplying fasteners which is simple .in construction, economical tomanufacture, and capable of applying high pulling loads to a fastener.

Further objects, features and advantages of this invention will becomeapparent from a consideration of the following description, the appendedclaims, and the accompanying drawing in which:

FIGURE 1 is a side elevational view of the tool of this invention, withsome parts broken away and other parts shown in section for the purposeof clarity; and

FIG. 2 is a transverse sectional View looking along the line 2--2 inFIG. 1.

- With reference to the drawing, the tool of this invention indicatedgenerally at is illustrated in FIG. 1 as including a body 12 having anend 14 and an end 16, hereinafter referred to as the front and rearends, respectively, of the body. The body 12 is generally tubular inshape, having a first bore-18 which extends inwardly from the front end14 of the body and a second larger bore 20. which extends inwardly fromthe rear end of the body. The rear end portion of the bore 18 isthreaded, as indicated at 22, for receiving the threaded inner end 24 ofa recirculating ball type nut 26. The larger bore accommodates thereturn conduit 25 for the balls 27 in the nut 26.

A screw 28 extends axially through and is threadably supported in thenut 26 and has an externally threaded front end 29 and a hex shape rearend 30 which is disposed rearwardly of the rear end 16 of the body 12. Ablock member 32 is fixedly threaded at its rear end onto the threadedend 29 of the screw 28 and has an axial cavity 34 which extends inwardlyfrom its front end. A stem member 36 has a head 38 at one end which isdisposed within the cavity 34 and at its opposite end the stem 36 isprovided with threads 40. A thrust bearing 42 is inserted in the cavity34 at a position in which it extends about the stem 36 and engages thehead 38 for maintaining the head 38 within the cavity 34. The thrustbearing 42 is in turn retained within the cavity by a re tainer ring 44disposed in a groove 46 at the front end of the block member 32.

A holder collar 47, positioned about the stem 36, has an inner endportion 48 positioned within the front end 14 of the body 12 andabutting the outer end of the thrust bearing 42. The collar 47 also hasan outer portion 50 which projects outwardly of the body 12 for apurpose to appear presently. Intermediate its ends the coilar 47 isprovided with a radial flange 52 which extends outwardly and abuts thefront end 14 of the body 12. A hollow retainer sleeve 53 is threadedonto the front end 14 of the body member 12 to a position in which ashoulder 54 on the sleeve 53 engages the radial flange 52 and clamps itbetween the shoulder 54 and the adjacent end 14 of the body 12.

A conventional nose assembly 58 of well-known type is mounted on thethreaded end of the stem 36 and projects forwardly therefrom. The noseassembly 58 includes a reciprocally movable collet 61 which has its rearend threaded onto the threaded end 40 of the stem 36.

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tractible jaw mechanism 62 which is engageable with a fastener to bepulled and a swaging anvil 64 engageable with the fastener collar orhead. An external flange 63 on the assembly 58 is clamped between thesleeve 53 and the collar portion 50 for retaining the nose assembly onthe tool 10.

A wrench or any other tool capable of rotating the screw 28 is appliedto the outer end 36 thereof, as shown in FIG. 1. To facilitate handlingof the tool 10 during rotation of thewrench 70, the body 12 is providedwith a handle member 72 which is threaded into an opening 74 in theunderside of the body 12, as shown in FIG. 1. A hand grip 76 is appliedto the handle member 72.

In the use of the tool 10, the operator grasps the hand grip 76 in onehand and by moving the body 12 forwardly engages the nose assembly 58with a fastener to be pulled. The operator then utilizes his other handto rotate the wrench 7i) in a direction to move the screw member 23rearwardly in the recirculating ball-type nut 26 to in turn retractblock member 32 and stem head 38 to contract and draw the jaw assembly62 rearwardly to thereby upset the fastener. By virtue of the fact thatthe nut and screw assembly is of the frictionless type, very highpulling loads can be applied to the nose assembly 58 by manual-rotationof the wrench 70. Consequently, the hand tool 10 is readily usable onlarge size fasteners.

Rotation of the wrench 70 is continuedv until the fastener has beenfully driven. At this time the screw 28 must be returned to its forwardposition illustrated in FIG. 1 before a subsequent fastener-applyingoperation can be commenced. The operator rotates the wrench 70 in anopposite direction to move the screw member 28 forwardly so that theblock member 32 engages the stem head 38 and moves it in a direction toreturn the jaw assembly 62 to its initial position. The thrust bearing42 engages the holder collar 47, as shown in FIG. 1, to signal a returnof the jaw assembly 62 to its initial Position. By virtue of thelocation of the collar 47, the pushing force exerted thereon by thethrust bearing 42 is transferred through the retainer sleeve 53 to thebody member 12. Consequently, there is no danger of accidentallydamaging some part of the tool 10 when the operator returns the screw 28to its forwardmost position. It can be appreciated that because littlemanual effort is required to actuate the screw 27, it is possible forthe operator to actually damage the tool 10 in moving it to its stopposition when he does not realize that it has reached its stop position.

From the above description, it is seen that this invention provides avery simple hand tool 19 which is capable of developing very highpulling loads. It can, therefore, be economically produced and is usablewith large size fasteners.

It will be understood that the specific construction of the improvedtool for driving fasteners which is herein disclosed and described ispresented for purposes of explanation and illustration and is notintended to indicate limits of the invention, the scope of which isdefined by the following claims.

What is claimed is:

1. In a fastener applying tool of thetype having a body and a noseassembly mounted on one end of said body and adapted to be engaged witha fastener for applying a pull to the fastener; a recirculatingball-type nut mounted in a fixed position on the end of said bodyopposite from said one end, a screw member supported in and extendingthrough said nut so that one end of said screw member is located in saidbody and another end is located outwardly of said body, a block assemblycomprising a block member directly supported on the end of said screwmember in said body for rotation therewith, a stem member having a headdisposed within said block member and having its reduced diameterportion extending from said head toward said one end of said body, saidstem member being secured to a slidable member of said nose assembly, athrust bearing in said block member extending about said stern memberand being engageable with said head, and retainer means secured to saidblock member and engageable with said thrust bearing for limiting theforward axial movement of said thrust bearing relative to said blockmember so that on rotation of said screw member in one direction apulling force is transmitted to said thrust bearing and to said head ofsaid stem member to move said head away from said one end of said bodymember.

2. In a fastener applying tool having a body and a nose assembly mountedon said body and adapted to be engaged with a fastener for applying apulling force to the fastener; a recirculating bait-type nut mounted ina fixed position on said body, a screw member supported in and extendingthrough said nut, first means for transmitting an axially rearwardmovement from said screw member to a slidable member of said noseassembly, said first means including a block member secured to one endof said screw member, a thrust bearing disposed within said block memberand means operatively associated with said block member and said thrustbearing for limiting the forward axial movement of said thrust bearingrelative to said block member, said first means also including a stemmember having one end secured to said slidable member of the noseassembly and having an opposite end grippingly engageable between saidbloc member and said thrust bearing.

3. The fastener applying tool of claim 2 further including a stop collarmounted in a fixed position on said body adjacent said one end thereofand disposed about said reduced diameter portion of said stem member andengageable with said thrust bearing to limit movement of said stemmember in a direction toward said one end of said body.

4. The apparatus of claim 3 further including a stop collar mounted infixed position on said body adjacent to said one end engageable withsaid thrust bearing to limit movement of said stem member in a directiontowards said one end of said body, said stop collar having means thereonin engagement with an outer member of said nose assembly for clampingsaid outer member to said body and for reacting the pulling forcecausing the axially rearward movement of said slidable member of saidnose assembly.

5. In a fastener applying tool of the type having a body and a noseassembly mountedon said body and adapted to be engaged with fastener forapplying a pulling force to the fastener, a recirculating ball-type nutmounted in a fixed position on said body, a screw member rotatablysupported in and extending through said nut and movable axially uponrotation in said nut, a thrust bearing, first means operativelyassociated with said screw member and said thrust bearing and engageablewith said thrust bearing for moving said thrust bearing axiallyrearwardly responsively to the axial movement of said screw member, saidfirst means including a block member having a cavity at its forward endfor housing said thrust bearing and being secured at its rearward end toone end of said screw member and a retaining member secured to saidblock member at said forward end and engageable with said thrust bearingfor limiting the forward axial movement of said thrust bearing relativeto said block member, and second means secured to a slidable member ofsaid nose assembly and including a portion engageable between saidthrust bearing and said block member for transmitting rearward axialmovement from said thrust bearing to said slidable member of said noseassembly.

References Cited in the file of this patent UNITED STATES PATENTS610,044 Glenn Aug. 30, 1898 2,333,418 Fischer Nov. 12, 1943 2,400,354Jensen May 14, 1946 2,406,949 Huck Sept. 3, 1946 UNITED STATES PATENTOFFICE CERTIFICATE OF CORRECTION Patent No. 3,028,987 April '10, 1962George J. Van Hecke It is hereby certified that error a ent requiringppears in the above numbered petcorrection and that the sa correctedbelow.

id Letters Patent should read as read l m reference numeral "3" read 2with" insert a Signed and sealed this 22nd day of-January 1963.

(SEAL) Attest:

ERNEST w. SWIDER DAVID LADD testing Officer Commissioner of Patents

